Photomultiplier Tubes PMTs

A typical PMT consists of a photocathode followed by focusing electrodes, electron multipliers, and an electron collector. When light enters the PMT, photons hitting the photocathode emit electrons into the tube and are directed toward the multiplier electrodes by the focusing electrodes' voltage. The electrons are multiplied at each electrode and finally detected as an electric signal from the anode. Because each photon gives rise to a cascade of electrons, PMTs are highly sensitive detectors that generate signals with very low noise. PMTs are not

Table 1 Summary of common real-time PCR instruments' reaction vessels and thermocycling mechanisms

Getting Started With Dumbbells

Getting Started With Dumbbells

The use of dumbbells gives you a much more comprehensive strengthening effect because the workout engages your stabilizer muscles, in addition to the muscle you may be pin-pointing. Without all of the belts and artificial stabilizers of a machine, you also engage your core muscles, which are your body's natural stabilizers.

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